2106606556166 has 48 divisors (see below), whose sum is σ = 3734244990000. Its totient is φ = 888505567488.

The previous prime is 2106606556163. The next prime is 2106606556193. The reversal of 2106606556166 is 6616556066012.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106606556163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6734810 + ... + 7040658.

It is an arithmetic number, because the mean of its divisors is an integer number (77796770625).

Almost surely, 2^{2106606556166} is an apocalyptic number.

2106606556166 is a deficient number, since it is larger than the sum of its proper divisors (1627638433834).

2106606556166 is a wasteful number, since it uses less digits than its factorization.

2106606556166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306981 (or 306974 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 2106606556166 in words is "two trillion, one hundred six billion, six hundred six million, five hundred fifty-six thousand, one hundred sixty-six".